Features： 1、POWER OUTPUT: Uninterruptible power supply module, with maximum output of 5V 1A, and supplied by polymer lithium battery or 18650 lithium battery. 2、OVERVOLTAGE PROTECTION: The module has input overvoltage protection. When the input exceeds 6V, the input will be cut off automatically to enter the battery power supply mode. 3、REVERSE PROTECTION: The module has reverse connection and short circuit protection. When the external power input exceeds 20V, the protection unit will be broken down. 4、GOOD PERFORMANCE: The battery boost module supports simultaneous charging and discharging, with large current and high efficiency, which is stable and reliable. 5、WIDE APPLICATION: The power board can be used for battery chargers, mobile power supplies, infrared alarms, switches and other network devices, routers, etc. Specification： Item Type: Power Supply Module Material: PCB Input: 5V 1A Output: 5V 1A (Maximum) Output Power: 5W Battery Supply: Polymer Lithium Battery, 18650 Lithium Battery. (Recommended Capacity Below 10000mA) Input Reverse Connection Protection: Yes Input Overvoltage Protection: Yes Output Reverse Connection Protection: Yes Output Short Circuit Protection: Yes Operating Temperature Range: -40-85℃ Operating Humidity Range: 0-95%RH Package List： 1 x Power Supply Module